Wrinkling Modes Of Sheet Metal During Press Forming Measured
By Optical Reflection Of Grating
Author(s)
M. Sakamoto & T. Sawada
Abstract
Wrinkling modes of sheet metal during press
forming measured by optical reflection of
grating
M. Sakamoto & T. Sawada
Department of Mechanical System Engineering,
Tokyo University of Agriculture and Technology, Japan.
Abstract
The surface deflections are measured during press forming by the following
optical method. The number of the wrinkles on the sheet metal can be observed
by the behaviors of the parallel straight-line gratings, which are reflected on the
mirror-like surface of the sheet metal. When the surface of the sheet metal
shows concave or convex, the pitches of the gratings are broadened or narrowed.
Applying moire method, the wrinkling can be observed more precisely. The
variations of the wrinkling during press forming are observed clearly.
1 Introduction
When sheet metal is formed by press machine, the wrinkling is often generated
on the product. Especially the surface deflections of the sheet metal must be
managed to protect from the generation, because they cannot be removed e
Keywords
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